Vuelidate is a model-based validation engine and form validation library for Vue.js applications. It functions as a state validator that checks data models and input fields against defined rules to ensure data consistency and correctness.
The library provides tools for form state management, allowing developers to track the modified status of fields and extract specific validation errors. It enables control over validation timing, such as deferring the evaluation of rules until a user interaction occurs.
The system covers a broad range of client-side data validation capabilities, including reactive state tracking and the use of a rule-based logic engine to process validation functions.